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← ScienceWhich risk increases when a PCB trace impedance changes?
A)Signal reflection amplitude increases✓
B)Differential mode noise decreases
C)Capacitance per unit length declines
D)Electromagnetic interference footprint reduces
💡 Explanation
Signal integrity degrades if impedance mismatch causes signal reflection because impedance variation alters voltage/current ratios, therefore reflection increases, rather than noise decreasing because impedance discontinuities scatter energy.
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